2025 Annual Meeting of Japan Association of Mineralogical Sciences (JAMS)
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Oral presentationR3: High-pressure science and deep Earth’s material

R3: High-pressure science and deep Earth’s material

Wed. Sep 10, 2025 9:30 AM - 12:00 PM JST
Wed. Sep 10, 2025 12:30 AM - 3:00 AM UTC
Oral Presentation B (Room No. 28)
Chairperson:Takeshi Sakai(Ehime University), Ryosuke Sinmyo(Meiji University), Takayuki Ishii(Okayama University)
9:30 AM - 10:00 AM JST(12:30 AM - 1:00 AM UTC)Invited Lecture

[R3-01]Lattice thermal conductivity of dry ringwoodite: implications for mantle dynamics and thermal evolution of stagnant slabs

*Youyue ZHANG1, Takashi YOSHINO2, Masahiro OSAKO3, Steeve Gréaux1 (1. GRC, Ehime Univ., 2. IPM, Okayama Univ., 3. National Museum of Nature and Science)
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10:00 AM - 10:15 AM JST(1:00 AM - 1:15 AM UTC)

[R3-02]Amorphousization of calcium carbonate at high pressure and high temperature?

*Hiroyuki KAGI1, Masahiro Takano1, Yuichiro Mori1, Hiroki Kobayashi1, Konstantin Litasov2, Hoku Kitagawa3, Noriyoshi Tsujino4, Sho Kakizawa4, Yuji Higo4 (1. UTokyo, 2. Russian Academy of Sciences, 3. Waseda Univ, 4. JASRI)
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10:15 AM - 10:30 AM JST(1:15 AM - 1:30 AM UTC)

[R3-03]Re-evaluation of hydrogen concentrations of deep-mantle hydrous minerals by a combination analysis of secondary ion mass spectrometry and neutron structure analysis

*Takuo OKUCHI1, Kenji Shimizu2, Naotaka Tomioka2, Narangoo Purevjav3, Shoichi Itoh4, Takayuki Ushikubo2, Akimasa Suzumura5 (1. Kyoto University, IIRNS, 2. JAMSTEC Kochi, 3. Seoul National Univ, 4. Kyoto University, Grad Sch Sci, 5. Kyoto University, Grad Sch Hum Env)
Comment()
10:30 AM - 10:45 AM JST(1:30 AM - 1:45 AM UTC)Student Presentation Award Entry

[R3-04]Temperature dependence of the Fe3+/ΣFe ratio in wadsleyite by electron energy loss spectroscopy (EELS)

*Kazutaka YAMAGUCHI1, Takaaki Kawazoe1, Toru Inoue1, Naotaka Tomioka2 (1. Hiroshima Univ. Advanced Science., 2. JAMSTEC, Kochi institute)
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10:45 AM - 11:00 AM JST(1:45 AM - 2:00 AM UTC)

[R3-05]Optimization of thermodynamic parameters for Mg2SiO4 wadsleyite and SiO2 stishovite and their application to thermodynamic calculation of stability field of MgSiO3 akimotoite

*Hiroshi Kojitani1, Masamichi Noda2, Toru Inoue3, Masaki Akaogi4 (1. Gakushuin Univ., 2. Delaware State Univ., 3. Hiroshima Univ., 4. Univ. of Tokyo)
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11:00 AM - 11:15 AM JST(2:00 AM - 2:15 AM UTC)Student Presentation Award Entry

[R3-06]Discovery of a new hydrous phase at temperature and pressure conditions of the mantle transition zone

*Hikato Amano1, Takaaki Kawazoe2, Toru Inoue2, Kazutaka Yamaguchi2 (1. Hiroshima Univ. Sci., 2. Hiroshima Univ. Advanced Science and Engineering)
Comment()
11:15 AM - 11:30 AM JST(2:15 AM - 2:30 AM UTC)

[R3-07]High-pressure and high-temperature density and the equation of state of dense hydrous phases, MgAl-phase D and Mg-phase D

Daichi MAEDA1, *Toru INOUE1, Yusuke EGI1, Takaaki KAWAZOE1, Yuji HIGO2, Sho KAKIZAWA2, Noriyoshi TSUJINO2 (1. Hiroshima Univ., 2. JASRI)
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11:30 AM - 11:45 AM JST(2:30 AM - 2:45 AM UTC)

[R3-08]The effect of pressure on the solid solubility of Al3+ into CaTiO3-perovskite

*Takaya Nagai1, Toru Shinmei2, Toru Inoue3, Tetsuo Irifune2 (1. Hokkaido Univ. Sci., 2. Ehime Univ. GRC, 3. Hiroshima Univ. Sci.)
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11:45 AM - 12:00 PM JST(2:45 AM - 3:00 AM UTC)

[R3-09]Water solubility of CaSiO3-CaTiO3 perovskites and its implication for water cycle in the lower mantle

*Takayuki ISHII1, Yingxin Yu2 (1. Okayama University, 2. USTC)
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